Illumination duplication for photography



. April 24, 1951 H. w. HART ILLUMINATION OUPLIOATION FOR PHOTOGRAPHY 2Sheets-Sheet 1 Filed Sept. 14, 1946 Z A 4.3. l@

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(MMI/ll April 24, 1951 H. w. HART 2,550,149

ILLUMINTION DUPLICATION FOR PHOTOGRAPHY Filed sept. 14, 194e 2Sheets-Sheet 2 wm; M l @Q2/fm af/mf Patented Apr. 24, 1951 ILLUMINATIONDUPIQICATION FOR PHOTOGRAPHY Halten W. Hart, Toledo, Ohio ApplicationSeptember 14, `1946, Serial N o. 696,984

VThis invention relates to duplicating special light effects byartificial illumination, 4 This invention has utility when incorporatedfor checking desired shadow relations in photographic work, andmanipulating to reproduce such relations upon flashlight exposure. Tothis end as a photographers aid, a light source is established with alocation to bring out details sought for the particular picture to ybetaken. With the camera having been placed, and the exposure controltherefor set, then the operator swings the unit herein to displace theflnder light as theretofore used by a flash light source. Forthwithsetting oi the flash in synfchronism with the exposure, and the lm has`made a record of the predetermined highlight and shadow regionstherefor. Y

Referring to the drawings:

Fig. 1 is a perspective view of an embodiment of the invention asin-use;

Fig. 2 is a side elevation of the unit of Fig. l, disconnected and incollapsed or non-use position therefor;

2 Claims. (Cl. 24U-1.3)

cated a light ray projecting reflector 2 for directing from a lightsource 3, as an incandescent position therefor. In this orienting, alight ray Fig. 3 is a view, with parts vbroken away, showing features ofthe wiring to the K dual arm-turntable structure;

Fig. l is a partial section on 4the line IVI-IV,

Fig. 3, showing theturntable pivot;

Fig. 5 is a plan view of the base for the turntable of Fig. 4, aportionbeing broken away to show wiring features thereto;

Fig. 6 is a view looking down on the turntable of Fig. 5, with some ofthe over parts shown and such at the swing position or 180counterclockwise from Fig. 5;

Fig. 7 is a fragmentary view of the turntable of Fig. 5*.-1but withspot, in lieu of slide contacts for thefiiashlight circuit connection; 1

Fig. 8 is a section on the line VIII-VIII, Fig. 7, showing the limitstop cam for the turntable;

Fig.9 is a partially broken away side view in an enlarged scale of oneof the gear segment carrying shafts; showing the screw mounting thereofin the housing; j i

Fig. 10 is a fragmentary'enlarged view showing the compressible frictionmember at the hingejjoint of the light carrying arm; Fig. 11 vis a planview of one of the companion blocks of the turntable, on a larger scalethan the showing in Fig. 6, and with omission of partsA upwardtherefrom;` and Fig. 12 is an enlarged view of a spring thrown contactpin over the view in Fig. 3, with the Y contact at a terminal 51 of Fig.7.

Upon an adjustable tripod I there maybe 1oprojecting similar reflectorI0, is brought to the finding position which had been occupied by thereector 2. A iiashlightr bulb II therein may be set 01T. 'I'he result isthat the identical studied highlights and shadows found by the timeexposure light 3, are duplicated for the sensitized film of the camerato record.

A normal electric lighting circuit lines I2', I3', to a fitting I4 atthe base 9, provide electric current supply to a flexible insulatedconductor pair I5, extending thru hollow turntable pivot IS into thehousing 8, and thence by hollow arm conduit I1 to the bulb 3. Parallelside walls of the housing 8 have aligned screws I8 (Fig. 6) therethrumounting a shaft I9 having fixed thereon a friction disk120 and a sectorgear 2|.

The setting of the screws I8 may-adjust the frictional holding exertedthru the housing upon the gear 2| parallel to a tangent from which theconduit I1 extends and is fixed with the gear. Adjustable clamping means22 (Fig. 3) hold a friction member 23 at a hinge joint 24 limited torock on an axis parallel to the axis of the shaft I9. There is clearance25 thru'the ball of the hinge joint 24 for the electrical conductor toalighting fixturesocketl 26 and an adapter fitting 21 carrying thereflector 2. The conduit arm I'I may swing approximately 90. on theshaft 9 as an axis.- In this movement, it

rides in av slot .or way 28 in the housing 8.

The gear sector 2| -isin mesh with a complementary gear sector 29 on ashaft 3|] mounted similarly to and in parallel with the shaft I9. FixedVwith the gear 2.9.is a conduit 3| identically oppositely extendingy tothe conduit I 1. 'I'he conduit 3| thru its hinge joint friction unit22,- 23, 24, 25, socket26 and adapter 2l mounts'the reflector Vforsimilar joint setting as adopted for the companion arm I1. It followsthat any rocking movement imparted to the arm I1 as to its housingmounting 8 for swinging on the shaft I9, brings about the same swingmovement in the same plane forthe arm 3|.

The housing 8 has a back or xed therewith a turntable insulation sectionor block 32 parallel to a somewhat similar insulation block 33 of thebase 9. A spacing washer 34 between the plates or blocks 32, 33, andabout the tube I6, provides the assembly at the turntable axis. Nuts 35on the tube I6 hold the grouping together. On the block 33 is a thinmetal wear plate 38 having depression ways or cams 31 to limit stops 38,39, a full half diameter orv 180 apart. A spring depressed plunger pin40 carried by the block 32 an appropriate radial distance from the axistube I6, rides over the waysv 31 into the stop 38 at clockwise turningof the housing 8 on the base 9 to swing the reector 2 down out of oraway from upward view checking position. At this stop position from theshifting of the reector 2, the duplicate reflector I I comes to theidentical position just vacated by the reflector 2.

Drycells or a special different or low voltage 4electric current supplyby lines 4I, 42, may be attached to fitting 43 providing a detachableconnection to the base 9, swingably mounted on a vertical axis of thetripod. I. The tting 43 electrically connects to a fitting 44 in thebase 9 from whichv extends conductor lines 45, 46, respectively to arcterminals 41, 48, in central area 49 opening -in the plate 36 exposingthe insulation block 33.

The terminals 41, 48, are concentric with the turntable pivot I9, andhave riding thereon spring thrown contact pins 59, 5I, extending thruthe block 32. The contacts 50, 5I, have terminals to lines 52, 53, inconductor 54.

when the finder arm l1 has had its iight source j 3 displaced by thelimit swinging of the housing 9 on its turntable connection with thebase 9, the ii'aishlight II is in the identical projection location forsending out light rays which had been used by the finder projector 2.The operator may then snap a switch 55 in the lines 4I, 42, with theinstant illumination result for camera sensitized film exposure'.v

The stem for the tripod I enters a socket 56 (Fig. 2) in the base 9.Accordingly, as the tripod I is set, the base 9 may be slipped thereonat the tripod stem top and the unit turned on such tripod stem as anaxis, in generally directing the unitV toward the region for lightexposure to be 'undertaken The stop positions 38, 39, for the turntablelocate the housing 8 in register for one arm slot guide opening 28 to beup or in the direction of the tripod stemextent, andthe other opening 28down or opposite thereto. The axis of the turntable, determined by thepivot sleeve i6, intersects the axis at the joint I, 56. With the axisIB horizontal, the axes of the parallel shafts I9, 38, in the housing 8extendtransversely to the axis '16. These three sets of axes are thus soassembled that in the normal operation thereof Ythey locate swinging orturning in three planes at 90 relationship therebetween. The'screws I8may so adjust the friction disk 29 that the dual arms I1, 3 i, retain adirection position set'therefor from the housing 8. Thev friction hinge22,

23,y 24, may normally retain the free end of the f arm in alignment.However, on some occasions withthe object close Vto the view line, it isa con'- venience to rock the non-use arm toclear the 4 view line byswinging it on the friction hinge 22, 23, 24, to clear the field ofillumination.

In lieu of the switch and the slide terminals 41, 48, there may be inthe area 49, terminals 51, 58, to be engaged by the contacts 50, 5I atthe flashlight stop position for the housing 8 as to the base 9.

What is claimed and it is desired to secure by Letters Patent is:

1. An illumination device comprising a base, a rst plate fixed with thebase, a second plate, a pivotal connection providing a turntablemounting for the second plate on the rst plate, a housing fixed with thesecond plate providing a chamber about the axis extended of said pivotalconnection, a pair of one-to-one ratio transmission interconnectedrockable members in the chamber between which members said axis extendedis located, the axes of rocking of said members being in a common planeparallel to the turntable plane, an arm fixed with each member andlaterally oiTset from said member axes, said arms extending from thehousing and having an alignment relation parallel with the planes of theaxes and turntable, said arms thru said transmission beingsimultaneously shiftable in movement from said'alignment relation, lightmeans, and an adjustable connection mounting a light means at the freeend of each arm.

2. An illumination device comprising a base, a first insulation platefixed with the base, a second insulation plate, a pivotal connectionproviding a turntable mounting for the second plate on Vthe irst plate,a housing fixed with the second plate providing a chamber about the axisextended of said pivotal connection, a pair of laterally adjacentinterconnected rockable members in the chamber having said axis'extendedmedially therebetween, an arm from each member oiTset from saidmemberrocking axes and adapted to have anv aligned position and coactingthru the memberint'erconnection for simultaneous shifting therefrom, alight means carried'by each arm, complementary electrical contact meansin coacting' relation between the plates, supply conductor means to thefirst plateY contact means, and conductor means from the Second platecontact means to the lights in the respective arms.

VHALTEN W. HART.

REFERENCES CITED The followingref'erences are of record in the le ofthis patent: v

` UNITED STATES PATENTS Number Germany Feb. 9. 1938

